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blog | Why use explosion proof motors? |
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Kollmorgen explosion proff motors

The use of explosion proof motors is essential for the safety of your personnel and equipment when operating in a hazardous location. Explosion proof motors are designed for use in hazardous environments where flammable gases, dust, or fibers are present. Electric motors generate heat under normal operating conditions and have the potential to generate a spark if a motor coil fails. Excessive motor case temperatures or a spark that is not properly contained can cause an explosion or ignite a fire in environments where specific hazardous materials are present.

What environments do explosion proof motors help in?

Motors in a Class I environment (UL designation), where flammable gases, vapors or liquids are present, are designed to prevent an internal spark or flame from escaping the motor into the hazardous environment. They are also designed so the motor case temperature does not exceed safe temperatures for environments where gases, vapors or liquids are present.

Motors in a Class II or Class III environment (UL designation), where certain dust or fibers are present, are designed so the motor case temperature does not exceed safe temperatures for combustible dust and fiber environments. While simply operating the motor at a lower current rating reduces the heat it produces, other failsafe methods to limit an excessive motor case temperature condition include thermostats that disengage the motor power before it reaches critical temperatures

Additional techniques are used for other devices operating in these environments, some of which can also be used on motors, which include purging or pressurization, additional explosion proof enclosures, encapsulation, or even liquid filled designs. Regardless of the technique used, the goal is to prevent the motor from igniting a flammable source under normal operating conditions or in the event of motor failure.

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Hazardous Duty Synchronous Motors

Providing torque up to 1,500 oz-in (1,059 N-cm), these synchronous motors are available in UL Listed versions suitable for use in Class I, Division 1&2, Group D hazardous locations. Frame sizes are NEMA 42 and 66 (110 mm and 170 mm).

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Goldline B/M & BH/MH Series

The B and M Series are low- and medium-inertia motors that run on 230 VAC line power. The BH and MH Series provide similar features and performance at 400/480 VAC.

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Engineer the Exceptional

Learn how to engineer exceptional machines, robots and vehicles with the highest-performing, most reliable motors, drives, automation solutions and more.

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